Boiling-machine.



E. D. JEFFERSON.

BOILING MACHINE.

Patented Sept. 10, 1918.

I C. D 0 0 0000000000000000000 00 0 m5 NORR'S PEYERS c0 pnamumauwAsnmamm o. c.

APPLICATION FILED JAN. 19. I917. 1,278,155.

OOOOOOOOOOOOOOOOOOO DOOOOOOOOOOODOOO OOOOOO OOOOOOOODOOO-OOOOODOOOOOOOOOOODOOOUOOOOOOOOOOOOOO 0000000000000000000000 foreign materials suchsel 101 is a cage or hollow drum 103 whichis nuemvn D. JEFFERSON, orBOSTON, MASSACHUSETTS.

BOILING-MACHINE.

Specification of Letters Patent. Patented Sept, 10, 1918.

Application filed January 19, 1917. Serial No. 143,396.

T 0 all whom it may concern:

Be it known that I, EUGENE D. JEFFER? son, a. citizen of the UnitedStates, residing at Boston, in the county of Suifolk and State ofMassachusetts, have invented certain new and useful Improvements inBoilinglilachines; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

The present invention relates to boiling machines and more particularlyto machines for boiling fibrous materials with alkaline solutions toprepare them for paper making.

accomplished by machines now in use. The

treatment in the machine also saponifies any oils present in thematerials and eliminates as the .motes and hulls of cotton fiber.

The invention also relates to certain other features and comprises thefeatures and combinations of parts hereinafter described andparticularly pointed out in the appended claims. e

The machine of the present invention is disclosed but not claimed in myapplication Serial No. 1959, filed January 13th, 1915, for a method oftreating fibrous materials,

which issued June 20th, 1916, as. Letters Patent No. 1,192,403.

The various features of the preferred form of the invention areillustrated in the accompanying drawings, in which Figure 1 is a view,partly in vertical section, of the boiling machine; and Fig. 2 is avertical section of the boiling machine, taken on" the line 22 ofFig. 1. I

The machine illustrated in the'drawings is described as follows: Thetank or vessel 101 is an air-tight horizontally disposed cylindricaldrum which is rotatably supported upon standards 102. Within thevesrigidly secured in any convenient Way to the tank 101. The cage 103is packed with the materials to be treated. The cage 103 is providedwith a large number. of perforations 10st so that the liquor may freelypass through the walls of the cage. Between the tank 101 and the cage103 are coils of steam pipe 105 by means of which the liquor in thedrumis boiled. The cage 103 serves to keep the materials out of directcontact with the hot steampipes so as not to scorchthem. The steamenters through a steam supply pipe 106 and the condensed vapor runs ofithrough the drip pipe 107. The pipes 106, 107 are provided withrotatable joints 108. The treating liquor and rinsing water may be runinto the tank through a pipe 109 and runoff through an overflow pipe110. The pipes 109, 110 are provided with rotatable joints 111 so thatthe tank may be rotated. The goods are packed in the cage 103 and areremoved therefrom through manholes 112. The pipe 109 or 110 ispreferably con nected with a safety valve, not shown, which prevents.dangerous pressures in the tank 101. The steam'which is admitted throughthe supply pipe 106 is preferably throttled by. an automatic throttlingvalve, not shown, which is controlled. by the pressure in the tank 101.

The treating liquor and the rinsing water coming into the tank throughthe pipe connection 109 pass into a hollow perforated pipe 113 which iscentrally located in the cage 103 so that the goods may be thoroughlytreated and rinsed. A retaining or baiile plate 130 is provided for thepurpose of carrying the goods around with the drum when it is rotated.

The tank 101 is provided with a 13111-- rality ofairvents 120. Each ventconsists ends of the levers 121. The tank is rotated in the direction ofthe arrow in Fig. 2. When a lever 121 strikes the stop 122. it

opens its vent valve 120 andv when a lever 121 strikes the stop 123 itcloses its vent Consequently, the 'vents are valve 120. opened at thetop of the tank and are closed at the bottom of the tank during therotation of the-tank. This allows the air to escape from the top of thetank, but prevents the liquor il'roni escaping through the vents.

litter the goods are packed in ti .1 cage lo l the manholes 112 areclosed and the tank is hall filled with the alkaline liquor. The tank isrotated and steam is let into the steam coils 105. The steam pipes 105bring the liquor to a boil and the steam generated from the boilingalkaline liquor drives out the air. The stops 122 and are, during thistime, held in the paths of the ends or the levers 121 so as to keep thevent valves open at. the top oi the tank and closed at the bottom.Batter the generated steam has ex e led the air from the tank the stopL2 is iilSL removed and then after the vents are all closed the stop isremoved. The expulsion of the air from the tank is important in that thegoods are not stwnfched or weakened by the oxidizing effect of air onthe heated goods. While it is of particular inmortance to expel the airduring the process or treating the goods in which the goods are liftedout of the treating liquor, it is also important and desirable to ex tthe air from the tank during th' process in which the goods are treatedwith boiling alkaline liquor and the oods are not lifted out of theliquor. For example. the usual process in which the goods remainimmersed in the liquor is improved by nxoviding the boiling koir or tankwith vents which permitthe air to escape so that the goods at thesurface oil the liquor are not chemica ly att'ected by oxygen.

(l is slowly rotated so that the The tank 1 liquor has a good chance todrain out of the goods which are lifted above the liquor level. Thesteam or alkali 'l'ume penetrates the goods and, as above pointed out,assist in the chen'iical reaction of discharging the color and whiteningthe goods. This chemical reaction is further accentuated by the dryingeli ect or the steam or alkali fume in the area above the liquor. Thesteam is in contact with the heating coils 105 which are above theliquor level and these heating coils serve to dry the steam.

It will be noted that in the apparatus shown, the steam which is usedfor boiling the liquor does not come into contact with rue liquor but iscarried through heating coils or a steam jacke. in this way the liquorlevel in the tank is not increased, nor is the liquor weakened, as isthe case when boiling carried out by introducing the steam directly intothe tank. Moreover, in the apparatus shown, the steam coils which areabove the liquor level serve to superheat the steam, a thing impossiblewhen the honor is boiled by the direct introduction or steam into it.

The successive and repeated innnersions of the goods in the boilingliquor with the consequent draining giic an ell'ective washg action. Itwill be seen that the cage in rich the goods are hold is spaced apartfrom the tank. This space between the cage and tie tank serves as adepository for dirt, gravel, precipitates from the chemical reactions,undissolved alkalis, and the like. 3 e cage is rotated so slowly thatthis h foreign material is not stirred up much, and,

. b, A preterred torm ot the invention having thus been described, whatis claimed is:

1. A boiling machine, having, in combination, a rotatable tank. afor-animated cage supported within and rotatable with the tank, andheating nieai s distributed entirely around the inner periphery of thetank.

A boiling machine, having, in combination. a rotatable tank, aforaminated cagesupported within and rotatable with the tank, heatingtubes distributed around the entire inner periphery of the tank, meansto supply to and exhaust a heating medium from said tubes during therotation of the tank, and an inlet and outlet tube for the tank by whichthe treating solution may be circulated through the tank during itscontinued rotation.

23. A boiling machine, having, in combination, a rotatable tank, aradiating heater secured within the tank, a series of air exhaust valvesmounted in the tank, and i'neans for opening and closing the valvesduring the rotation of the tank.

+l. A boiling machine, having, in combination, a rotatable tank, aradiating heater secured within the tank, means for maintaining asurface of a. treating solution at approximately the center of the tank,and means located above the surface the solution for opening and closingthe valves whereby the valves will only be opened while they are abovethe surface of the solution.

5 A boiling machine, having, in combination, a rotatable tank, aforaminated cage supported within and rotatable with the tank, and aseries of heating tubes secured to the tank between the tank and the 6.A boiling machine, having, in combination, a rotatable tank, a seriesof: steam tubes secured to the inner periphery of the tank, atoraminated cage within the tubes for holding materials out of contactwith the tubes, and means for supplying and exhausting steam from thetubes.

A boiling machine, having, in combination, a rotatable pressure-tighttank, a cage secured Within and rotatable with the tank, a foraminatedtube mounted approximately in the axis of the cage, and connections Withthe tube for supply treating solutions Within the cage While itcontinues to rotate.

8. A boilin machine, having, in combination, a rotata 1e pressure-tighttank, a 0- raminated cage supported Within and rotatable with the tank,heating tubes distributed around the inner periphery of the tank andlocated between the cage and the tank, means for supplying the tubesWith steam, means for circulating a treating solution through the tankduring its continued rotation, exhaust valves mounted in the tank, andmeans for opening and closing the valves as the tank rotates.

EUGENE D. JEFFERSON.

Boyle: o! thll patent any be obtained for five cents each, by addressingthe Commissioner of Patents.

Wellington, D. G."

